Measurement technology Archive - Page 3 of 8 - WGM

VLF Measuring M-VLF34 | Cable Test

VLF Meter M-VLF34 | Cable Testing – The field of work of the M-VLF34 is cable testing and cable diagnosis. The high voltage generator is a very compact and very light VLF test instrument. With the variable VLF system, it is possible to select the two polarities accordingly the mode DC testing and the AC output frequency. Cable sheath testing or sheath fault location are part of the selection range. M-VLF34 is a portable generator that generates high voltage to eliminate cable faults.

For the 0.1Hz VLF test system is suitable for medium voltage cable testing. VLF meter type M-VLF34 is a portable system for cable diagnosis and testing. A high output current up to 85mA is considered the special strength of the device. The powerful output is able to drive capacitive loads up to 15 microfarad. Weighing only 45kg, the high voltage generator is a compact VLF unit, making it perfect for mobile use. Due to its light weight, the site of operation can be easily reached.

With a maximum output voltage, it is possible to test a cable with a length of up to 8 km. M-VLF34 can also be extended to a cable diagnostic system due to its full modularity. Also, the system offers different operating modes. A built-in discharging device is available for discharging the DUTs. The M-VLF34 has a manual and automatic test diagnostic sequence. No external PC is required on site. Due to the fact that the VLF measuring device is not thermally limited, it can be operated continuously over the entire operating time.

We offer you advice on the following topics: VLF measuring devices | cable diagnostics | VLF diagnostics.

PD150 Fault indication system partial discharge

Online partial discharge: The PD150 is a fault alarm system for partial discharges in the control cabinet. With the PD 150 fault alarm system, partial discharge activities within a live switch cabinet can be detected remotely. Partial Discharge is commonly found on aging MV & HV cable accessories. Insulation faults are an important factor in degradation and reduction of the lifetime of an electrical apparatus. This translates into raised exploitation costs and questionable reliability, while economic performance and reliability are key criteria in the evaluation of an electricity supplier.

One of the challenges is to address those secondary substations which are too often overlooked due to their high volume spread in a large territories. The PD-Annunciator is the next generation of partial discharge monitoring system for local or remote deployment at reasonable cost. Its unique design allows for quick and easy DIN rail installation, or directly held on metallic cabinets with its strong magnets. Need to monitore multiple switchgear cabinets?

PD-Annunciator is daisy-chainable for clean installation that requires minimal cabling. The easily available RJ45 cables are in fact all that’s needed to connect modules one another for data communication and power supply. Up to 3 sensors are connected to PD Annunciator. In case of detected PD activity, a local alarm would turn on the corresponding LED indicator and send this same alarm status to SCADA. Next Generation of Online partial discharge: PD-Annunciator is perfectly suited for substation environment, field applications, remote locations, etc. – 20+ years experience in the partial discharge detection and analysis field.

Breakdown Analyzer | ÖLPG | Oil Tester

The ÖLPG Oil Tester is a portable “Breakdown Analyzer” designed for on-site oil testing. This device fully automates the breakdown voltage or dielectric strength test for insulating oil, making the process both fast and cost-effective. A critical test for transformer oil quality is the breakdown voltage test: lower resulting voltage indicates lower oil quality. Ultra-light transformer oil testers like the ÖLPG are powerful and ideal for on-site testing, enabling operators to assess insulating oil quality directly, without sending samples to a lab. Immediate action can be taken based on results if necessary.

A quick procedure and shutdown time of less than five µs enable efficient testing. High-contrast display facilitates handling and navigation, while the Breakdown Analyzer also supports non-destructive testing of synthetic, ester, and silicone oils. Breakdown voltage in insulating oils is determined easily by sampling oil directly from the transformer or current transformer, then subjecting it to the fully automated test. Results provide operators with a clear assessment of oil quality, guiding decisions on retention or replacement.

Automatically generated test reports are ready for download as PDFs onto a USB stick. Rapid voltage cut-off ensures safe, non-destructive testing for synthetic, ester, and silicone oils. Pre-defined, fully automated test sequences adhere to current international standards, guaranteeing compliance with legal testing requirements. In conclusion, the ÖLPG Oil Tester represents a significant advancement in oil testing technology. Offering a reliable and efficient solution for operators in need of accurate and timely results.

We offer you advice on the topics of: Dielectric breakdown voltage | dielectric strength | oil tester

Mobile Particle Counter | PZMG 100

The PZMG100 is a mobile particle counter which can be used to quickly and easily check oil cleanliness and oil condition in hydraulic and lubrication systems during a service call. Samples can be taken directly via a pressure line or via the integrated pump. A measurement can be performed manually or automatically at a predefined time interval. Portable particle counters are preferably used for the on-site analysis of operating oils in hydraulic systems. Precise measurement of particle shapes and particle sizes in different versions. The mobile particle counter cleans the oil and measures its quality. High-quality particle counters from WGM Support for particle measurement during maintenance with the possibility of flow visualization.

We offer you advice on the following topics: Mobile particle counter | Operating oils | Hydraulic oil

Corrosive Sulphur | CS100 | Corrosive Sulphur Kit

The CS100 Corrosive Sulphur Kit provides a practical and cost-effective alternative to expensive laboratory tests. Its purpose is to detect corrosive copper sulphide deposits accurately. These deposits frequently cause multiple issues, which often lead to transformer failures. Standard inspections rarely reveal these deposits, as technicians must unwind copper wire and de-oil the paper to see the shiny sulphide deposits clearly. Usually, copper wires display dark or multicolored surfaces, and their discoloration can vary greatly along the entire length of the conductor. Until recently, costly laboratory tests were the only reliable method for detecting corrosive sulfur in transformer oil.

Sulfur exists in transformer oil in different forms and various compounds. Copper sulfides can appear with very diverse characteristics. Because of this, technicians suspect that undetected copper sulfides likely cause numerous malfunctions in transformers and reactors. The portable CS100 Kit offers a rapid, convenient, and affordable testing option.

Common copper corrosion tests refer to established procedures, such as ASTM D1275 Method B and IEC 62535 (the CCD test).

The IEC 62535 procedure, known as the CCD test and formerly named Cigre A2.32.TF01, tests copper conductors by accelerated oxidation at high temperatures. During this process, technicians wrap copper conductors in kraft paper and then perform a visual inspection. This step aims to identify corrosive sulfur compounds, which could contaminate the cellulose insulation with copper sulphide.

The ASTM D1275 Method B also uses accelerated oxidation, but on an electrolytic copper strip at 150°C for 48 hours. Afterward, a visual assessment checks for sulfur compounds that might contaminate copper surfaces. This method provides additional insights, allowing for a more comprehensive understanding of copper contamination risks.

We offer you advice on the following topics: Corrosive sulphur | Insulating Oil | Transformer oil

Tan Delta Meter | TDM 1515 | Tan Delta Measurement

Tan Delta Meter | TDM 1515 | Transformer oil analysis

Tan Delta Meter | Tan Delta Measurement

The Tan Delta Meter TDM1515 delivers accurate dissipation factor measurement of insulating oils. It measures the dielectric dissipation factor in transformer oil, insulating fluids, and other materials. The device supports advanced dielectric analysis, enabling users to evaluate tan delta resistivity, specific resistance oil, and capacitance. These measurements provide clear insights into fluid losses and help assess the condition of the insulation.

The TDM1515 serves as a versatile Tan Delta Analyser for Oil. It includes an integrated oil test cell that handles dissipation factor measurement oil without requiring additional components. The Tan Delta Tester Oil features several advanced components, including high-frequency induction heating, a precise temperature sensor, a measuring bridge, and AC and DC power sources. A standard capacitor and digital IC circuits improve performance and measurement reliability.

High-frequency induction heating ensures quick and even warming of the oil test cell. The system allows users to adjust the heating easily for precise control. The built-in drain system simplifies oil removal, making the process safe and efficient during Transformer oil Tan Delta testing.

In AC test mode, the TDM1515 uses the AC-DC-AC conversion method to prevent voltage and frequency instability. It maintains stable operation, even when the voltage generator is active. The integrated SF6 three-pole capacitor shields insulating oil dissipation factor and capacitance measurements from temperature and humidity interference.

The TDM1515 excels in professional Tan Delta Measurement applications. It provides reliable results for transformer oil tester tasks and long-lasting performance, making it an essential tool for professionals in dissipation factor measurement of insulating oils.

We offer you advice on the following topics: TDM1515 | Dielectric Dissipation Factor | Transformer Oil